Concepts Of Physics MCQ Edition [Volume 1]
- Exam
- Concepts Of Physics MCQ Edition [Volume 1]
- Subject
- Physics
- Chapter
- Some Mechanical Properties of Matter
Concepts Of Physics MCQ Edition [Volume 1] · Physics · Some Mechanical Properties of Matter
When we speak of the surface of a liquid, we are referring to
When we speak of the surface of a liquid, we are referring to
Options
- Aa layer with a thickness on the order of
- Ball the molecules exposed to the atmosphere
- Ca layer with a thickness on the order of
- Da geometrical plane such as
Correct answer
A. a layer with a thickness on the order of
Step-by-step solution
The surface of a liquid is not a mere geometrical plane but a layer of finite thickness known as the surface film.
The thickness of this layer is equal to the molecular range, which is the maximum distance up to which the intermolecular forces of attraction are effective.
The molecular range for liquids is of the order of to .
Therefore, the surface of a liquid refers to a layer with a thickness on the order of .
The thickness of this layer is equal to the molecular range, which is the maximum distance up to which the intermolecular forces of attraction are effective.
The molecular range for liquids is of the order of to .
Therefore, the surface of a liquid refers to a layer with a thickness on the order of .